How to insert content at a specified location in JS

Below I will share with you a simple example of JS inserting content at a specified position in the text. It has a good reference value and I hope it will be helpful to everyone.

The example is as follows:

function insertAtCursor(myField, myValue) { 
 
 //IE 浏览器 
 if (document.selection) { 
  myField.focus(); 
  sel = document.selection.createRange(); 
  sel.text = myValue; 
  sel.select(); 
 } 
 
 //FireFox、Chrome等 
 else if (myField.selectionStart || myField.selectionStart == '0') { 
  var startPos = myField.selectionStart; 
  var endPos = myField.selectionEnd; 
 
  // 保存滚动条 
  var restoreTop = myField.scrollTop; 
  myField.value = myField.value.substring(0, startPos) + myValue + myField.value.substring(endPos, myField.value.length); 
  
  if (restoreTop > 0) { 
  myField.scrollTop = restoreTop; 
  } 
  
  myField.focus(); 
  myField.selectionStart = startPos + myValue.length; 
  myField.selectionEnd = startPos + myValue.length; 
 } else { 
  myField.value += myValue; 
  myField.focus(); 
 } 
} 
 
 
 

The above is what I compiled for everyone. I hope it will be helpful to everyone in the future.

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